diff --git a/libc/test/src/__support/CMakeLists.txt b/libc/test/src/__support/CMakeLists.txt
--- a/libc/test/src/__support/CMakeLists.txt
+++ b/libc/test/src/__support/CMakeLists.txt
@@ -20,31 +20,28 @@
     libc.src.__support.common
 )
 
-# These tests fails with an illegal instruction
-if(NOT LIBC_GPU_TARGET_ARCHITECTURE_IS_NVPTX)
-  add_libc_test(
-    high_precision_decimal_test
-    SUITE
-      libc-support-tests
-    SRCS
-    high_precision_decimal_test.cpp
-    DEPENDS
-      libc.src.__support.high_precision_decimal
-      libc.src.__support.uint128
-  )
+add_libc_test(
+  high_precision_decimal_test
+  SUITE
+    libc-support-tests
+  SRCS
+  high_precision_decimal_test.cpp
+  DEPENDS
+    libc.src.__support.high_precision_decimal
+    libc.src.__support.uint128
+)
 
-  add_libc_test(
-    str_to_float_test
-    SUITE
-      libc-support-tests
-    SRCS
-      str_to_float_test.cpp
-    DEPENDS
-      libc.src.__support.str_to_float
-      libc.src.__support.uint128
-      libc.src.errno.errno
-  )
-endif()
+add_libc_test(
+  str_to_float_test
+  SUITE
+    libc-support-tests
+  SRCS
+    str_to_float_test.cpp
+  DEPENDS
+    libc.src.__support.str_to_float
+    libc.src.__support.uint128
+    libc.src.errno.errno
+)
 
 add_libc_test(
   integer_to_string_test
@@ -72,19 +69,16 @@
   )
 endif()
 
-# This test fails with an illegal memory access on NVPTX.
-if(NOT LIBC_GPU_TARGET_ARCHITECTURE_IS_NVPTX)
-  add_libc_test(
-    uint_test
-    SUITE
-      libc-support-tests
-    SRCS
-      uint_test.cpp
-    DEPENDS
-      libc.src.__support.uint
-      libc.src.__support.CPP.optional
-  )
-endif()
+add_libc_test(
+  uint_test
+  SUITE
+    libc-support-tests
+  SRCS
+    uint_test.cpp
+  DEPENDS
+    libc.src.__support.uint
+    libc.src.__support.CPP.optional
+)
 
 add_libc_test(
   fixedvector_test
@@ -96,8 +90,6 @@
     libc.src.__support.fixedvector
 )
 
-# This test fails with a segmentation fault on NVPTX.
-if(NOT LIBC_GPU_TARGET_ARCHITECTURE_IS_NVPTX)
 add_libc_test(
   char_vector_test
   SUITE
@@ -107,7 +99,6 @@
   DEPENDS
     libc.src.__support.char_vector
 )
-endif()
 
 add_executable(
   libc_str_to_float_comparison_test
diff --git a/libc/test/src/__support/CPP/CMakeLists.txt b/libc/test/src/__support/CPP/CMakeLists.txt
--- a/libc/test/src/__support/CPP/CMakeLists.txt
+++ b/libc/test/src/__support/CPP/CMakeLists.txt
@@ -65,19 +65,16 @@
   )
 endif()
 
-# This test fails with a segmentation fault on NVPTX.
-if(NOT LIBC_GPU_TARGET_ARCHITECTURE_IS_NVPTX)
-  add_libc_test(
-    stringstream_test
-    SUITE
-      libc-cpp-utils-tests
-    SRCS
-      stringstream_test.cpp
-    DEPENDS
-      libc.src.__support.CPP.span
-      libc.src.__support.CPP.stringstream
-  )
-endif()
+add_libc_test(
+  stringstream_test
+  SUITE
+    libc-cpp-utils-tests
+  SRCS
+    stringstream_test.cpp
+  DEPENDS
+    libc.src.__support.CPP.span
+    libc.src.__support.CPP.stringstream
+)
 
 add_libc_test(
   optional_test
diff --git a/libc/test/src/__support/char_vector_test.cpp b/libc/test/src/__support/char_vector_test.cpp
--- a/libc/test/src/__support/char_vector_test.cpp
+++ b/libc/test/src/__support/char_vector_test.cpp
@@ -20,7 +20,7 @@
   CharVector v;
   ASSERT_EQ(v.length(), size_t(0));
 
-  constexpr char test_str[] = "1234567890";
+  static constexpr char test_str[] = "1234567890";
   for (size_t i = 0; test_str[i] != '\0'; ++i) {
     v.append(test_str[i]);
   }
@@ -32,7 +32,7 @@
   ASSERT_EQ(v.length(), size_t(0));
 
   // 100 characters (each row is 50)
-  constexpr char test_str[] =
+  static constexpr char test_str[] =
       "12345678901234567890123456789012345678901234567890"
       "ABCDEFGHIJKLMNOPQRSTUVWXYabcdefghijklmnopqrstuvwxy";
   for (size_t i = 0; test_str[i] != '\0'; ++i) {
@@ -48,7 +48,7 @@
   ASSERT_EQ(v.length(), size_t(0));
 
   // 1000 characters
-  constexpr char test_str[] =
+  static constexpr char test_str[] =
       "12345678901234567890123456789012345678901234567890"
       "ABCDEFGHIJKLMNOPQRSTUVWXYabcdefghijklmnopqrstuvwxy"
       "12345678901234567890123456789012345678901234567890"
diff --git a/libc/utils/gpu/loader/nvptx/Loader.cpp b/libc/utils/gpu/loader/nvptx/Loader.cpp
--- a/libc/utils/gpu/loader/nvptx/Loader.cpp
+++ b/libc/utils/gpu/loader/nvptx/Loader.cpp
@@ -233,6 +233,12 @@
   if (CUresult err = cuCtxSetCurrent(context))
     handle_error(err);
 
+  // Increase the stack size per thread.
+  // TODO: We should allow this to be passed in so only the tests that require a
+  // larger stack can specify it to save on memory usage.
+  if (CUresult err = cuCtxSetLimit(CU_LIMIT_STACK_SIZE, 3 * 1024))
+    handle_error(err);
+
   // Initialize a non-blocking CUDA stream to execute the kernel.
   CUstream stream;
   if (CUresult err = cuStreamCreate(&stream, CU_STREAM_NON_BLOCKING))